// addDeploymentConfig is used for making sure that new deployment configs with triggers pointing
// to existing images will be deployed as soon as they are created.
func (c *ImageChangeController) addDeploymentConfig(obj interface{}) {
dc := obj.(*deployapi.DeploymentConfig)
for _, stream := range c.streamLister.GetStreamsForConfig(dc) {
glog.V(4).Infof("Reconciling stream %q for config %q\n", imageapi.LabelForStream(stream), deployutil.LabelForDeploymentConfig(dc))
c.enqueueImageStream(stream)
}
}
// updateDeploymentConfig is used for making sure that deployment configs with new triggers
// pointing to existing images will be deployed as soon as they are updated.
func (c *ImageChangeController) updateDeploymentConfig(old, cur interface{}) {
// A periodic relist will send update events for all known configs.
newDc := cur.(*deployapi.DeploymentConfig)
oldDc := old.(*deployapi.DeploymentConfig)
if newDc.ResourceVersion == oldDc.ResourceVersion {
return
}
for _, stream := range c.streamLister.GetStreamsForConfig(newDc) {
glog.V(4).Infof("Reconciling stream %q for config %q\n", imageapi.LabelForStream(stream), deployutil.LabelForDeploymentConfig(newDc))
c.enqueueImageStream(stream)
}
}
// Handle processes image change triggers associated with imagestream.
func (c *ImageChangeController) Handle(stream *imageapi.ImageStream) error {
configs, err := c.dcLister.GetConfigsForImageStream(stream)
if err != nil {
return fmt.Errorf("couldn't get list of deployment configs while handling image stream %q: %v", imageapi.LabelForStream(stream), err)
}
// Find any configs which should be updated based on the new image state
var configsToUpdate []*deployapi.DeploymentConfig
for n, config := range configs {
glog.V(4).Infof("Detecting image changes for deployment config %q", deployutil.LabelForDeploymentConfig(config))
hasImageChange := false
for j := range config.Spec.Triggers {
// because config can be copied during this loop, make sure we load from config for subsequent loops
trigger := config.Spec.Triggers[j]
params := trigger.ImageChangeParams
// Only automatic image change triggers should fire
if trigger.Type != deployapi.DeploymentTriggerOnImageChange {
continue
}
// All initial deployments should have their images resolved in order to
// be able to work and not try to pull non-existent images from DockerHub.
// Deployments with automatic set to false that have been deployed at least
// once shouldn't have their images updated.
if (!params.Automatic || config.Spec.Paused) && len(params.LastTriggeredImage) > 0 {
continue
}
// Check if the image stream matches the trigger
if !triggerMatchesImage(config, params, stream) {
continue
}
_, tag, ok := imageapi.SplitImageStreamTag(params.From.Name)
if !ok {
glog.Warningf("Invalid image stream tag %q in %q", params.From.Name, deployutil.LabelForDeploymentConfig(config))
continue
}
// Find the latest tag event for the trigger tag
latestEvent := imageapi.LatestTaggedImage(stream, tag)
if latestEvent == nil {
glog.V(5).Infof("Couldn't find latest tag event for tag %q in image stream %q", tag, imageapi.LabelForStream(stream))
continue
}
// Ensure a change occurred
if len(latestEvent.DockerImageReference) == 0 || latestEvent.DockerImageReference == params.LastTriggeredImage {
glog.V(4).Infof("No image changes for deployment config %q were detected", deployutil.LabelForDeploymentConfig(config))
continue
}
names := sets.NewString(params.ContainerNames...)
for i := range config.Spec.Template.Spec.Containers {
container := &config.Spec.Template.Spec.Containers[i]
if !names.Has(container.Name) {
continue
}
if !hasImageChange {
// create a copy prior to mutation
result, err := deployutil.DeploymentConfigDeepCopy(configs[n])
if err != nil {
utilruntime.HandleError(err)
continue
}
configs[n] = result
container = &configs[n].Spec.Template.Spec.Containers[i]
params = configs[n].Spec.Triggers[j].ImageChangeParams
}
// Update the image
container.Image = latestEvent.DockerImageReference
// Log the last triggered image ID
params.LastTriggeredImage = latestEvent.DockerImageReference
hasImageChange = true
}
}
if hasImageChange {
configsToUpdate = append(configsToUpdate, configs[n])
}
}
// Attempt to regenerate all configs which may contain image updates
anyFailed := false
for _, config := range configsToUpdate {
if _, err := c.dn.DeploymentConfigs(config.Namespace).Update(config); err != nil {
utilruntime.HandleError(err)
anyFailed = true
} else {
glog.V(4).Infof("Updated deployment config %q for trigger on image stream %q",
deployutil.LabelForDeploymentConfig(config), imageapi.LabelForStream(stream))
}
}
if anyFailed {
return fmt.Errorf("couldn't update some deployment configs for trigger on image stream %q", imageapi.LabelForStream(stream))
}
return nil
}
// Handle processes image change triggers associated with imagestream.
func (c *ImageChangeController) Handle(stream *imageapi.ImageStream) error {
configs, err := c.listDeploymentConfigs()
if err != nil {
return fmt.Errorf("couldn't get list of deployment configs while handling image stream %q: %v", imageapi.LabelForStream(stream), err)
}
// Find any configs which should be updated based on the new image state
configsToUpdate := []*deployapi.DeploymentConfig{}
for _, config := range configs {
glog.V(4).Infof("Detecting image changes for deployment config %q", deployutil.LabelForDeploymentConfig(config))
hasImageChange := false
for _, trigger := range config.Spec.Triggers {
params := trigger.ImageChangeParams
// Only automatic image change triggers should fire
if trigger.Type != deployapi.DeploymentTriggerOnImageChange {
continue
}
// All initial deployments (latestVersion == 0) should have their images resolved in order
// to be able to work and not try to pull non-existent images from DockerHub.
// Deployments with automatic set to false that have been deployed at least once (latestVersion > 0)
// shouldn't have their images updated.
if !params.Automatic && config.Status.LatestVersion != 0 {
continue
}
// Check if the image stream matches the trigger
if !triggerMatchesImage(config, params, stream) {
continue
}
_, tag, ok := imageapi.SplitImageStreamTag(params.From.Name)
if !ok {
glog.Warningf("Invalid image stream tag %q in %q", params.From.Name, deployutil.LabelForDeploymentConfig(config))
continue
}
// Find the latest tag event for the trigger tag
latestEvent := imageapi.LatestTaggedImage(stream, tag)
if latestEvent == nil {
glog.V(5).Infof("Couldn't find latest tag event for tag %q in image stream %q", tag, imageapi.LabelForStream(stream))
continue
}
// Ensure a change occurred
if len(latestEvent.DockerImageReference) == 0 || latestEvent.DockerImageReference == params.LastTriggeredImage {
glog.V(4).Infof("No image changes for deployment config %q were detected", deployutil.LabelForDeploymentConfig(config))
continue
}
names := sets.NewString(params.ContainerNames...)
for i := range config.Spec.Template.Spec.Containers {
container := &config.Spec.Template.Spec.Containers[i]
if !names.Has(container.Name) {
continue
}
// Update the image
container.Image = latestEvent.DockerImageReference
// Log the last triggered image ID
params.LastTriggeredImage = latestEvent.DockerImageReference
hasImageChange = true
}
}
if hasImageChange {
configsToUpdate = append(configsToUpdate, config)
}
}
// Attempt to regenerate all configs which may contain image updates
anyFailed := false
for _, config := range configsToUpdate {
if _, err := c.client.DeploymentConfigs(config.Namespace).Update(config); err != nil {
anyFailed = true
glog.V(2).Infof("Couldn't update deployment config %q: %v", deployutil.LabelForDeploymentConfig(config), err)
}
}
if anyFailed {
return fatalError(fmt.Sprintf("couldn't update some deployment configs for trigger on image stream %q", imageapi.LabelForStream(stream)))
}
glog.V(5).Infof("Updated all deployment configs for trigger on image stream %q", imageapi.LabelForStream(stream))
return nil
}